51933621487439 has 4 divisors (see below), whose sum is σ = 52708750166424. Its totient is φ = 51158492808456.

The previous prime is 51933621487381. The next prime is 51933621487487. The reversal of 51933621487439 is 93478412633915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51933621487439 - 2²⁴ = 51933604710223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51933621487499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387564339392 + ... + 387564339525.

It is an arithmetic number, because the mean of its divisors is an integer number (13177187541606).

Almost surely, 2^{51933621487439} is an apocalyptic number.

51933621487439 is a deficient number, since it is larger than the sum of its proper divisors (775128678985).

51933621487439 is an equidigital number, since it uses as much as digits as its factorization.

51933621487439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775128678984.

The product of its digits is 117573120, while the sum is 65.

The spelling of 51933621487439 in words is "fifty-one trillion, nine hundred thirty-three billion, six hundred twenty-one million, four hundred eighty-seven thousand, four hundred thirty-nine".